diff --git a/cmd/mdatagen/loader.go b/cmd/mdatagen/loader.go
index 9353aae405b..451bc0c5b4d 100644
--- a/cmd/mdatagen/loader.go
+++ b/cmd/mdatagen/loader.go
@@ -122,7 +122,7 @@ type metric struct {
 	Sum *sum `mapstructure:"sum,omitempty"`
 	// Gauge stores metadata for gauge metric type
 	Gauge *gauge `mapstructure:"gauge,omitempty"`
-	// Gauge stores metadata for gauge metric type
+	// Histogram stores metadata for histogram metric type
 	Histogram *histogram `mapstructure:"histogram,omitempty"`
 
 	// Attributes is the list of attributes that the metric emits.